Thesis (M.A.)--Duquesne University, 2004. / Title from document title page. Abstract included in electronic submission form. Includes bibliographical references (p. 45-47).

Substantial savings in operations can be achieved by reducing the amount of wastewater that must be pumped and treated. Utilities have long dealt with the infiltration and inflow (I and I) issues in their system by televising their pipes and identifying leak points, but this primarily addresses only the infiltration part of “I and I.” Inflow, which creates hydraulic issues during rain events, leads to sanitary sewer overflows and can subject the utility to fines from regulatory agencies. As a result, dealing with the inflow portion of I and I is needed. The goal of this thesis is to differentiate inflow and infiltration from baseflow and to determine the effectiveness of different methods used to reduce inflow and infiltration in sanitary sewer lines. An analysis was conducted on the benefits and cost effectiveness of different inflow/infiltration approaches (slip-lining sewer lines, stormwater manhole inserts, replacing sewer lines, smoke testing, etc.) and cost savings municipalities can expect to receive from each. / Includes bibliography. / Thesis (M.S.)--Florida Atlantic University, 2015. / FAU Electronic Theses and Dissertations Collection

Thesis (Ph.D.)--Victoria University (Melbourne, Vic.), 2007.

Thesis (Doctoral)--İzmir Institute Of Technology, İzmir, 2005. / Keywords:Infrastructure, city form, sustainable development, sewerage systems, geographical information systems. Includes bibliographical references (leaves. 164-174).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (Ph. D.)--Ohio State University, 2008. / Title from first page of PDF file. Includes bibliographical references (p. 106-108).

Orientador: Gustavo Henrique Ribeiro da Silva / Banca: Jorge Hamada / Banca: Ronan Cleber Contrera / Resumo: Esta pesquisa foi desenvolvida em uma Estação Compacta de Tratamento de Efluente (ECTE) composta por reator Upflow Anaerobic Sludge Blanket (UASB) seguido de Biofiltro Aerado Submerso (BAS), localizada no município de Uru-SP e foi conduzida em parceria com a Sabesp. As ECTEs podem ser uma ótima alternativa para a implantação de um sistema descentralizado que possa atender pequenas comunidades, no entanto, tais sistemas ainda são pouco utilizados para o tratamento municipal de efluentes sanitários e ainda há pouca experiência com relação à sua operação, portanto esta pesquisa teve como objetivo avaliar a eficiência de tal sistema e realizar seu acompanhamento operacional, e através dos resultados obtidos apresentar diretrizes para sua melhor operação, proporcionando um efluente final de melhor qualidade. Este acompanhamento foi realizado através de análises físico-químicas com duração de 16 semanas e foram feitas coletas semanais de cada etapa do tratamento e coletas mensais do perfil de lodo do reator UASB. Através deste acompanhamento foi possível estimar diretrizes para o volume e periodicidade de descarte de lodo uma vez que havia um histórico de problemas em relação a Sólidos Sedimentáveis (SS) na ECTE e apresentar sugestões de melhorias para o sistema em relação às questões de projeto, dimensionais e operacionais. Durante a pesquisa, o sistema mostrou-se bastante eficiente principalmente em relação às remoções de Demanda Bioquímica de Oxigênio (5 dias) (DBO5) e Demanda Q... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: This research was developed in a Compact Wastewater Treatment Plant (CWWTP) composed of Upflow Anaerobic Sludge Blanket (UASB) reactor followed by Submerged Aerated Biofilter (BAF), located in the municipality of Uru-SP and was conducted in partnership with Sabesp. The CWWTPs can be a great alternative to the implementation of a decentralized system that can serve small communities, however, such systems are still little used for municipal treatment of sewage and there is little experience regarding its operation, so this search aimed to evaluate the efficiency of such a system and perform its operational monitoring, and through the results provide guidelines for its best operation, providing a final effluent of better quality. This monitoring was carried out through physical-chemical analyzes during 16 weeks and weekly collections were made of each stage of the treatment and monthly collections of UASB reactor sludge profile. Through this monitoring it was possible to estimate guidelines for volume and intervals of sludge disposal since there was a history of issues regarding Sedimentable Solids (SS) in the CWWTP and to present suggestions for improvements in the system in relation to design issues, dimensional and operational. During the search, the system proved to be very efficient especially in relation to Biochemistry Demand Oxygen (5 days) (BOD5) and Chemical Oxygen Demand (COD) filtered removals with average values of at least 91% and 85% respectively. It is also beli... (Complete abstract click electronic access below) / Mestre

This is a broad study of stormwater infiltration and inflow effects on two sewer systems with an equivalent size for comparison in Brevard County, Florida. The systems are Rockledge, which is located on the highest ground in the area, and Cocoa Beach, which is located down in the local water table. Rainfall data, sewage flow, quality, and flow rates were collected from the Brevard Public Health Department, Cocoa Beach and Rockledge sewage Plants, weather stations, and the Cocoa Water plant. The data indicated minimum, or no infiltration thru the Rockledge wastewater collection system. However, infiltration thru the Cocoa Beach system was estimated to be 3,800 gpd/in. dia./mi. Also, the sewage collected thru Rockledge and Cocoa Beach plants averaged about 50% and 160% of the water consumed respectively.

Introduction: Automation and the danger of over productivity have created unprecedented amounts of leisure time in the United States. We are now in the process of finding that major potential recreational areas have been seriously polluted by the by-products of the same automation and productivity which have created our leisure time. Increasing urbanization has been accompanied by progressively more stringent demands on water quality and quantity while steadily impairing the same parameters . One of the major sources of water quality impairment due to concentrated urban growth is combined sewer overflow... / Ph. D.

Experiments were performed with anaerobically digested sludge and a plate and frame filter press to determine filter press performance over a range of polymer doses and under a variety of sludge and polymer mixing conditions. In addition, bench-scale polymer dosing and mixing experiments were conducted with the same sludge samples to determine the relationship between the bench-scale tests and actual plate and frame filter press performance. Dewatering rate was measured in bench- scale experiments with a Capillary Suction Time (CST) device and dewatering rate in pilot-scale experiments was quantified by measuring the volume of filtrate from the plate and frame press. The dimensionless quantity, Gt, was used to measure total mixing intensity input where G was the mean velocity gradient and t was the mixing time for the sludge and polymer. The performance of the plate and frame filter press was optimized by predicting polymer dose with a bench-scale mixing device. For the plate and frame filter press used in this study, the polymer dose was selected by finding the optimum polymer dose for the bench-scale mixing system set at a Gt value of 30,000. The sludge and polymer were mixed with a Gt value of 5000 prior to introduction to the filter press. The polymer dosing and mixing scheme that was developed for the filter press in this study indicates that the filter press imparts some shear (G) on the sludge and that polymer must be provided to reagglomerate fractured sludge particles. An estimate of the Gt value for the filter press that was used in this study is 15,000 to 40,000. / Master of Science